Autosticha silacea is a moth in the Autostichidae family. It was described by Bradley in 1962. It is found on the New Hebrides. The wingspan is 12-14 mm. The forewings are warm buff, the whole wing diffusedly irrorate with dark brown and fuscous scales with a weak purplish sheen. The stigmata are weak and obscure, the plical slightly basad of the discal, the second discal hardly discernible at the end of the cell in the middle. The hindwings are uniform whitish cream-buff.